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<div id="docs"><div class="toc-holder" id="doc-nav"><ul id="doc-level-one"><li><a href="events.html">List of Events</a></li><li class="category">Core<ul class="category-list"><li><a href="Crafty.html">Crafty</a></li><li><a href="Crafty Core.html">Crafty Core</a></li><li><a href="Crafty-bind.html">Crafty.bind()</a></li><li><a href="Crafty-c.html">Crafty.c()</a></li><li><a href="Crafty-clone.html">Crafty.clone()</a></li><li><a href="Crafty-defineField.html">Crafty.defineField()</a></li><li><a href="Crafty-e.html">Crafty.e()</a></li><li><a href="Crafty-extend.html">Crafty.extend()</a></li><li><a href="Crafty-frame.html">Crafty.frame()</a></li><li><a href="Crafty-getVersion.html">Crafty.getVersion()</a></li><li><a href="Crafty-init.html">Crafty.init()</a></li><li><a href="Crafty-isPaused.html">Crafty.isPaused()</a></li><li><a href="Crafty-one.html">Crafty.one()</a></li><li><a href="Crafty-pause.html">Crafty.pause()</a></li><li><a href="Crafty-s.html">Crafty.s()</a></li><li><a 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href="Touch.html">Touch</a></li></ul></li><li class="category">Misc<ul class="category-list"><li><a href="Crafty-addEvent.html">Crafty.addEvent()</a></li><li><a href="Crafty-device.html">Crafty.device</a></li><li><a href="Crafty-removeEvent.html">Crafty.removeEvent()</a></li><li><a href="Crafty-support.html">Crafty.support</a></li></ul></li><li class="category">Model<ul class="category-list"><li><a href="Model.html">Model</a></li></ul></li><li class="category">Scenes<ul class="category-list"><li><a href="Crafty-scene.html">Crafty.scene()</a></li></ul></li><li class="category">Stage<ul class="category-list"><li><a href="Crafty-background.html">Crafty.background()</a></li><li><a href="Crafty-scene.html">Crafty.scene()</a></li><li><a href="Crafty-viewport.html">Crafty.viewport</a></li></ul></li><li class="category">Utilities<ul class="category-list"><li><a href="Crafty-math.html">Crafty.math</a></li><li><a href="Delay.html">Delay</a></li><li><a href="Storage.html">Storage</a></li></ul></li></ul></div><div id="doc-content" class="doc-page-holder"><div class="doc-page"><h1>Crafty.math <span></span></h1><div class="doclet" id="Crafty-math"><span class="markdown"><p>A set of utility functions for common (and not so common) operations.</p>
</span></div><div><h4>Methods</h4><ul class="page-toc"><li><a href="#Crafty-math-abs">.abs()</a></li><li><a href="#Crafty-math-amountOf">.amountOf()</a></li><li><a href="#Crafty-math-clamp">.clamp()</a></li><li><a href="#Crafty-math-degToRad">.degToRad()</a></li><li><a href="#Crafty-math-distance">.distance()</a></li><li><a href="#Crafty-math-lerp">.lerp()</a></li><li><a href="#Crafty-math-negate">.negate()</a></li><li><a href="#Crafty-math-radToDeg">.radToDeg()</a></li><li><a href="#Crafty-math-randomElementOfArray">.randomElementOfArray()</a></li><li><a href="#Crafty-math-randomInt">.randomInt()</a></li><li><a href="#Crafty-math-randomNumber">.randomNumber()</a></li><li><a href="#Crafty-math-squaredDistance">.squaredDistance()</a></li><li><a href="#Crafty-math-withinRange">.withinRange()</a></li></ul><div class="doclet" id="Crafty-math-abs"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.abs()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">this </span><span class="sig-noun">Crafty.math.abs</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">n</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> n </dt><dd><span class="markdown"><p>Some value.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>Absolute value.</p>
</span></dd></dl></div><span class="markdown"><p>Returns the absolute value.</p>
</span></div><div class="doclet" id="Crafty-math-amountOf"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.amountOf()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.amountOf</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">checkValue</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">minValue</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">maxValue</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> checkValue </dt><dd><span class="markdown"><p>Value that should checked with minimum and maximum.</p>
</span></dd></dl><dl class="parameter"><dt> minValue </dt><dd><span class="markdown"><p>Bottom of the range</p>
</span></dd></dl><dl class="parameter"><dt> maxValue </dt><dd><span class="markdown"><p>Top of the range</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>The position of the checked value in a coordinate system normalized such that <code>minValue</code> is 0 and <code>maxValue</code> is 1.</p>
</span></dd></dl></div><span class="markdown"><p>If checkValue is within the range, this will return a number between 0 and 1.</p>
</span></div><div class="doclet" id="Crafty-math-clamp"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.clamp()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.clamp</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">value</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">min</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">max</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> value </dt><dd><span class="markdown"><p>A value.</p>
</span></dd></dl><dl class="parameter"><dt> max </dt><dd><span class="markdown"><p>Maximum that value can be.</p>
</span></dd></dl><dl class="parameter"><dt> min </dt><dd><span class="markdown"><p>Minimum that value can be.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>The value between minimum and maximum.</p>
</span></dd></dl></div><span class="markdown"><p>Restricts a value to be within a specified range.</p>
</span></div><div class="doclet" id="Crafty-math-degToRad"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.degToRad()</h2><span class="markdown"><p>Converts angle from degree to radian.</p>
</span><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">degToRad</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-noun">angleInDeg</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> angleInDeg </dt><dd><span class="markdown"><p>The angle in degrees.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>The angle in radians.</p>
</span></dd></dl></div></div><div class="doclet" id="Crafty-math-distance"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.distance()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.distance</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">x1</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">y1</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">x2</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">y2</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> x1 </dt><dd><span class="markdown"><p>First x coordinate.</p>
</span></dd></dl><dl class="parameter"><dt> y1 </dt><dd><span class="markdown"><p>First y coordinate.</p>
</span></dd></dl><dl class="parameter"><dt> x2 </dt><dd><span class="markdown"><p>Second x coordinate.</p>
</span></dd></dl><dl class="parameter"><dt> y2 </dt><dd><span class="markdown"><p>Second y coordinate.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>The distance between the two points.</p>
</span></dd></dl></div><span class="markdown"><p>Distance between two points.</p>
</span></div><div class="doclet" id="Crafty-math-lerp"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.lerp()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.lerp</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">value1</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">value2</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">amount</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> value1 </dt><dd><span class="markdown"><p>One value.</p>
</span></dd></dl><dl class="parameter"><dt> value2 </dt><dd><span class="markdown"><p>Another value.</p>
</span></dd></dl><dl class="parameter"><dt> amount </dt><dd><span class="markdown"><p>Amount of value2 to value1.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>Linear interpolated value.</p>
</span></dd></dl></div><span class="markdown"><p>Linear interpolation. Passing amount with a value of 0 will cause value1 to be returned,
a value of 1 will cause value2 to be returned.</p>
</span></div><div class="doclet" id="Crafty-math-negate"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.negate()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.negate</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">percent</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> percent </dt><dd><span class="markdown"><p>The probability of returning <code>-1</code></p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>1 or -1.</p>
</span></dd></dl></div><span class="markdown"><p>Returns <code>1</code> or <code>-1</code> randomly.</p>
</span></div><div class="doclet" id="Crafty-math-radToDeg"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.radToDeg()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.radToDeg</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">angle</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> angleInRad </dt><dd><span class="markdown"><p>The angle in radian.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>The angle in degree.</p>
</span></dd></dl></div><span class="markdown"><p>Converts angle from radian to degree.</p>
</span></div><div class="doclet" id="Crafty-math-randomElementOfArray"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.randomElementOfArray()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Object </span><span class="sig-noun">Crafty.math.randomElementOfArray</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Array </span><span class="sig-noun">array</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> array </dt><dd><span class="markdown"><p>A specific array.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>A random element of a specific array.</p>
</span></dd></dl></div><span class="markdown"><p>Returns a random element of a specific array.</p>
</span></div><div class="doclet" id="Crafty-math-randomInt"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.randomInt()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.randomInt</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">start</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">end</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> start </dt><dd><span class="markdown"><p>Smallest int value that can be returned.</p>
</span></dd></dl><dl class="parameter"><dt> end </dt><dd><span class="markdown"><p>Biggest int value that can be returned.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>A random int.</p>
</span></dd></dl></div><span class="markdown"><p>Returns a random int within a specific range.</p>
</span></div><div class="doclet" id="Crafty-math-randomNumber"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.randomNumber()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.randomNumber</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">start</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">end</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> start </dt><dd><span class="markdown"><p>Smallest number value that can be returned.</p>
</span></dd></dl><dl class="parameter"><dt> end </dt><dd><span class="markdown"><p>Biggest number value that can be returned.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>A random number.</p>
</span></dd></dl></div><span class="markdown"><p>Returns a random number in within a specific range.</p>
</span></div><div class="doclet" id="Crafty-math-squaredDistance"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.squaredDistance()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Number </span><span class="sig-noun">Crafty.math.squaredDistance</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">x1</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">y1</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">x2</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">y2</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> x1 </dt><dd><span class="markdown"><p>First x coordinate.</p>
</span></dd></dl><dl class="parameter"><dt> y1 </dt><dd><span class="markdown"><p>First y coordinate.</p>
</span></dd></dl><dl class="parameter"><dt> x2 </dt><dd><span class="markdown"><p>Second x coordinate.</p>
</span></dd></dl><dl class="parameter"><dt> y2 </dt><dd><span class="markdown"><p>Second y coordinate.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>The squared distance between the two points.</p>
</span></dd></dl></div><span class="markdown"><p>Squared distance between two points.</p>
</span></div><div class="doclet" id="Crafty-math-withinRange"><a href="#doc-nav" class="doc-top">Back to top</a><h2 class="doclet-header">Crafty.math.withinRange()</h2><div class="crafty-method"><code class="signature"><span class="sig-phrase"><span class="sig-qualifier">public </span><span class="sig-qualifier">Boolean </span><span class="sig-noun">Crafty.math.withinRange</span></span><span class="sig-seperator">(</span><span class="sig-phrase"><span class="sig-qualifier">Number </span><span class="sig-noun">value</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">min</span></span><span class="sig-seperator">,</span><span class="sig-phrase"><span class="sig-qualifier"> </span><span class="sig-qualifier">Number </span><span class="sig-noun">max</span></span><span class="sig-seperator">)</span></code><dl class="parameter"><dt> value </dt><dd><span class="markdown"><p>The specific value.</p>
</span></dd></dl><dl class="parameter"><dt> min </dt><dd><span class="markdown"><p>Minimum value.</p>
</span></dd></dl><dl class="parameter"><dt> max </dt><dd><span class="markdown"><p>Maximum value.</p>
</span></dd></dl><dl class="parameter returns"><dt class="returns"> [Returns] </dt><dd><span class="markdown"><p>Returns true if value is within a specific range.</p>
</span></dd></dl></div><span class="markdown"><p>Check if a value is within a specific range.</p>
</span></div></div></div></div></div>
			
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